Here are links to recent reviews and video demos of the new RSPduo:

SWLing.com review: https://swling.com/blog/2018/05/a-review-of-the-sdrplay-rspduo-14-bit-dual-tuner-sdr/

Sevenfortyone video: https://youtu.be/8WNxtanfWIk

OG! Review: https://youtu.be/T-eXoNskDmA